This document explains how to fix Microsoft Outlook error 0x800CCC78 if it is not working properly or throwing an error while installing, updating, launching/opening, performing action like sending or receiving emails, configuring emails etc.
The error message may look like:
(0x800CCC78) Cannot send the message. Verify the email address in your account properties. The server responded:550 user (Your Email ID) has exceeded their send quota.
Sending reported error (0x800CCC78) : Cannot Send the Message. Verify the e-mail address in your account properties. The server responded
This solutions applies for following version of Microsoft Outlook:
Outgoing connection blocked due to conflicting application.
Corrupt Outlook Settings
How to Resolve Outlook Error Code 0x800CCC78
Step 1: Disable Windows Firewall Temporarily :
1. Hold Windows Key + R. Run Dialogue Box will open up.
2. Enter Firewall.cpl and Press OK.
3. Click on “Turn Windows Firewall On or Off”
4. In Private network Setting, select “Turn off Windows firewall (not recommended)”
5. Do the same for Public Network Setting.
6. Press OK. Note: After the issue is resolved you must turn the Windows Firewall on.
Step 2:Check for corrupt system files:
1. Hold Win Key + R. Run Dialogue Box will open up.
2. Enter CMD and Click OK.
3. In command Prompt Copy following commands (Simply select the command and hold Ctrl+C and press Ctrl+V in command prompt)
The system will take some time to check. Let it run for a while. If it finds any issues in “operating system” integrity it will automatically fix it.
Note: You will need Administrator Access to Run the above command. Simply Right Click on cmd button and select “Run as Administrator”
In most cases Outlook error 0x800CCC78 should be resolved by following above steps. If however the issue still persists it means there is some critical issue with your system which needs to be fixed manually and is recommended to be done by an experienced Computer Technician.
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